Competitive protein adsorption on polysaccharide and hyaluronate modified surfaces.

Adsorption of bovine serum albumin (BSA) and fibrinogen (Fg) was measured on six distinct bare and dextran- and hyaluronate-modified silicon surfaces created using two dextran grafting densities and three hyaluronic acid (HA) sodium salts derived from human umbilical cord, rooster comb and Streptococcus zooepidemicus. Film thickness and surface morphology depended on the HA molecular weight and concentration. BSA coverage was enhanced on surfaces in competitive adsorption of BSA:Fg mixtures.

Do physicians discuss needed diet and nutrition health topics with adolescents?

Purpose: Preventive services guidelines recommend screening all adolescents for diet habits, physical activity and growth, counseling underweight teens about body image and dieting patterns, and counseling overweight or obese teens about dietary habits and exercise. In this study, we assess whether adolescents at risk for overweight or for eating disorders have discussed recommended diet and nutrition topics with their physicians.

Methods: We surveyed 14-18-year-old adolescents who had been seen for well care in primary care pediatric and family medicine practices.